[plt-scheme] Continuation handling in web-server

Don, 

I don't think the relationship between (a) and (A) is that important.
The real problem is being able to cleanly specify that different
buttons go to different places in the code.  That in turn is a problem
with the way HTTP is specified.  They should have associated ACTION
tags with individual submission buttons, NOT with the form as a whole.
Had they done so, it would have been easier to distinguish between the
different buttons that the user could press.  As it stands, we have no
choice but to demux at the receiving end.

Paul Graunke wrote a nice macro for performing this demux.  I don't
know whether he still maintains it or intends to.

There is still the problem of generating the different continuations;
that is tied up with the demux.

Paul?

Shriram